> ## Documentation Index
> Fetch the complete documentation index at: https://docs.noresponse.org/llms.txt
> Use this file to discover all available pages before exploring further.

# 409 key_limit_reached

> You called POST /v1/workspaces/{workspace_id}/keys while the environment already holds 100 keys that authenticate.

HTTP 409Not retryable

## Why

Revoked keys do not count, and nor does a rotated key after its overlap window.

## What to do

List the keys with `GET /v1/workspaces/{workspace_id}/keys`, revoke one that you no longer use, then create the key again.

## In the SDKs

The Node and Python SDKs raise `ConflictError`. The Go SDK returns `*apierrors.ConflictError`, which you match with `errors.As`.

```json title="409 key_limit_reached" theme={"theme":{"light":"github-light-default","dark":"github-dark-default"}}
{
  "type": "https://docs.noresponse.org/problems/key-limit-reached",
  "title": "Key limit reached",
  "status": 409,
  "detail": "The environment already has 100 keys that authenticate; revoke one first.",
  "code": "key_limit_reached",
  "request_id": "5e8be3a91fde9499f7ce48ae66290895"
}
```

Every error has this shape. [Errors and limits](https://docs.noresponse.org/reference/errors.md) lists every code.


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